In saw-teeth



l. R. LUCE.

Saw-Teeth. NOJSLAOY, Patented May 26,1874.

JAMES ROOT LUCE, OF STEVENS POINT, IVISOONSIN.

IMPRQVEMENT IN sAw-TEETH.

Specication forming part of Letters Patent No. 15 1,4107', dated May 26, 1874; application Iilcd November 6,1873. I

To all whom it may concern:

Be it known that I, JAMES It. LUCE, of Stevens Point, in the county of Portage and in the State of Visconsin, have invented certain new and useful Improvements in Saw- Teeth; and do hereby declare, that the followin gis a full, clear, and exact description thereof, reference being had to the accompanying drawings and to the letters ot1 reference marked thereon, making a part ot' this specification.

My invention relates to that class of sawteeth which are provided with removable cutting-teeth; and it consists in the means for holding the tooth in the plate, as will be hereinafter more fully set forth.

In order to enable others skilled in the art to which my invention appertains to make and use the same, I will now proceed to describe its construction and operation, referring to the annexed drawing, in which- Figure l is a side view of a part of a 'circular saw with a plate having a removable cutting-tooth embodying my invention; and Fig. 2 shows the various parts detached, in perspective.

A B represent a part of a circular sawplate, formed in any of the known and usual ways. O represents the cutting-tooth, constructed substantially in the manner shown in the drawing, to be inserted in a slot, d, iu the plate. In the edges of the tooth O are made curved or V-shaped grooves to tit over the correspondingly-shaped edges of the slot d, so that when the tooth is pressed down in the slot it cannot come out sidewise. The butt of the cutting-tooth O rests against a shoulder, j', formed in the bott-om of the slot d. In the under side ofthe tooth, a suitable distance from the outer end, is formed a shoulder, fz, which, when the tooth is inserted, rests against a point, z, on the saw-tooth. rIhe cutting-tooth O is thus firmly supported in the saw-plate B, and it is held there by the following means From the bottom or lower end ofthe slot d extends another slot, di, farther into the saw-plate, and the lower end Z2 of this slot is made round or circular, as shown in Fig. 2. D represents a spring, the outer end of which forms a hook, a, and the inner end forms a rivet, rlhis spring is inserted in the slot all, with the rivet z passing through the enlarged part Z2 of the said slot, where it is rmly riveted to the saw-tooth. NVhen the cutting-point O is inserted in the slot d. and pressed down, the hook a springs into a notch, b, made in the cutting-point, and holds it tirinly in its place.

To remove the toot-h the hook a is sprung, by means .of any suitable instrument, ont ot' the notch b, when the point can readily be pulled out. p

Having thus fully described my invention,

what I claim, and desire to secure by Letters The combination of the saw-plate A B, having slots d dl., shoulder x, and point z, the removable cutting-tooth O, having'notch I) and shoulder y, and the spring D, with hook a and rivet t', all constructed substantially as and for the purposes herein set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 20th day of October, 1873.

.mints noor Loon.

Vitnesses:

A. N. MARE, JAMns A. FnLcrI. 

